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Regulatory and Rate Matters - Transportation and Electrification Program (TEP) (Details) - PNM - USD ($) $ in Millions	Feb. 22, 2024	Jun. 01, 2023
Public Utilities, General Disclosures [Line Items]
Expected budgeted expenditures		$ 37.1
Budget period		3 years
Budge dedication to low-income customers		22.00%
Budget dedication to low-income customers		$ 8.0
Subsequent Event
Public Utilities, General Disclosures [Line Items]
Expected budgeted expenditures	$ 4.0
Budget period	3 years

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